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Loop Artifacts

The nature of the  beat  repeater  effect  places  the highest  emphasis on  timing,  but  this 
comes  with  a  certain  cost  to  other  aspects  which  sometimes  includes  sonic  quality.  
Buffre’s loop  engine does what it can  to limit pops and clicks when cycling from the end 
point to the start  point  of  an  audio segment,  but  there are situations  where this simply 
cannot be avoided.  

The biggest culprits of artifacts are pure tones or  bass heavy material.   The worst  case 
would be low frequency sine waves. If you  find a situation  where Buffre cannot process 
the loop  without a  very hard zero crossing glitch, adding a  high  pass filter  or  EQ with a 
low shelf cut may help.  

Insert  a  MClass  Equalizer  before  Buffre  and  shelve  about  -12dB around  130Hz.    To 
compensate  for  the  low  end  loss,  add  a  second  MClass  Equalizer  after  Buffre  with 
+12dB of gain at the same 130Hz center  frequency.  Naturally  the program audio will  be 
changed due to the equalization, but the tradeoff may be worth the compromise.

v1.0.2 operation manual

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Summary of Contents for Buffre

Page 1: ...Operation Manual v1 0 2 operation manual 1...

Page 2: ...op duration is selected by pressing different keys on the MIDI keyboard and adjusting the pitch wheel increases the repetition speed for accelerating drill effects The loop engine features several pla...

Page 3: ...ain Output Level Control 10 Length Sweep Wheel Loop Duration Control 11 BitCrush Wheel Digital Distortion Effect 12 Pitch Knob Adjust the Loop Pitch Sample Rate 13 Snap Button Enables Half Step Divisi...

Page 4: ...ol Gate Inputs 7 Reset Position Gate In Resets the Loop Start 8 Advance Quarter Note Gate In triggers the Advance function 9 Backwards Quarter Note Gate In triggers the Backwards function Modulation O...

Page 5: ...nd you will need to manually create a corresponding sequencer lane using the Create Sequencer Track Edit menu item MIDI Keyboard Trigger Pressing a key in the range of D1 to F3 engages the beat repeat...

Page 6: ...Manual Length controls are limited to 1 2 1 4 1 8 1 16 and 1 32 loop lengths The main purpose of the Manual Trigger and Length Controls is to provide quick access for those without a MIDI Keyboard and...

Page 7: ...B2 256th Note 1 256 A 2 128th Triplet 1 128T 256th Note 1 256 A2 dotted 256th 3 256 G 2 128th Note 1 128 G2 64th Triplet 1 64T 128th Note 1 128 F 2 dotted 128th 3 128 F2 64th Note 1 64 E2 32nd Triple...

Page 8: ...op until playback cycles back to the beginning of the loop Bit Crush Bit Crush is a type of digital distortion which can be applied to audio in the Buffre loop engine Increasing the control intensifie...

Page 9: ...m loop The following illustrations refer to this as the baseline of an unprocessed signal Mode 1 Past When Buffre is triggered in Past Playback Mode a section of pre sampled audio is looped and the in...

Page 10: ...beat repeat effect that engages at the time a trigger event is received When triggered incoming audio is stored to memory up to the end of the time division then loops continuously until the trigger i...

Page 11: ...e access to pre sampled audio and when a trigger is received the effect will immediately start reversing the audio playback and sound as if the loop is rewinding The loop will continue to loop backwar...

Page 12: ...data will be played in reverse as the memory fills with incoming audio information Reverse FW BW When Reverse is enabled and playback is set to either current or past palindrome modes the initial dir...

Page 13: ...is released When the trigger is released the incoming audio passes through normally Switching the button on again while holding the trigger resumes normal loop playback Current Loop On Disabled When i...

Page 14: ...one or more loop cycles audio will immediately stop if the button is switched off If you continue to hold the trigger and switch the button on again playback continues at the point where it stopped T...

Page 15: ...ffre to Past Playback with Reverse and then click on the Manual Trigger button to engage a one shot reverse sweep Current One Shot It s important to note that you will hear no effect when One Shot Mod...

Page 16: ...rs The Gate On button and the Gate Start and Gate Length Knobs Gate On The Gate On button enables or disables the effect Gate Start The Gate Start parameter sets the position where audio is rendered f...

Page 17: ...As you move the knob away and back towards 0 the knob position will snap at the vertical point and the lamp will go off The scaling is non linear and non symmetrical by design If you prefer a linear s...

Page 18: ...ared transition Release is also useful when you start working with capturing granular elements in the 1 128th note divisions and smaller This process can modify the harmonics of extremely short loopin...

Page 19: ...ack loop segment forward by a quarter note You can press the Advance Quarter button several times until you reach the end of the audio stored in memory and the waveform segments will shift to correspo...

Page 20: ...olume The Volume knob controls the output level directed to the main audio outputs Both audio processed in the loop engine and the input signal gain are adjusted by this control FX Send Controls Buffr...

Page 21: ...menu Select Bu re Beat Repeater This will add the device to the rack and automaJcally cable it as an insert e ect between the Dr OctoREX and the MIX Channel device 4 Press Play on the Sequencer Transp...

Page 22: ...you do not have an audio le you may also import a REX loop to the audio track 2 On the Audio Track device press the SHOW INSERT FX buYon to expand the insert e ect secJon 3 From the Create Menu CreaJ...

Page 23: ...Bank Kong Patches directory 3 Hold down the Shic Key to bypass autorouJng and add a Bu re Beat Repeater from the Create Menu CreaJve E ects sub menu 4 Hit TAB to view the rear of the rack 5 Connect Bu...

Page 24: ...Then hit TAB to ip back to the front of the rack 6 Create a ReDrum Drum Computer and from the contextual menu Select Reset Device to clear all preloaded seWngs 7 On Drum Channel 1 set drum on events o...

Page 25: ...onnected to the Reason Sampling Inputs When the loop engine is engaged audio from the FX Send outputs is directed to the sampling inputs allowing you to capture looped distorted or reversed audio snip...

Page 26: ...ect it You will see a bounding box appear around the device then from the Create Menu UJliJes submenu select Matrix PaYern Sequencer 5 Press the TAB key to ip the rack and con rm the autorouJng connec...

Page 27: ...to view the rear of the rack 13 Connect the Matrix Curve CV output to the Bu re Length CV Pitch Wheel Input Leave the CV trim seWng to the default of 127 14 Set the Matrix Curve CV to Bipolar mode the...

Page 28: ...Reason Factory Sound Bank Dr Rex Percussion Loops Keith LeBlanc KLB Rubber Perc directory and load the loop Prc04_Rubber_156_KLB rx2 3 Create a Bu re Beat Repeater and verify that it s inserted betwe...

Page 29: ...Program gate events on step 1 step 5 step 9 and step 13 All other gate steps should be o see image on previous page 9 Press Play on the Sequencer Transport to hear the glitching rhythmic loop that cha...

Page 30: ...l help govern the signal level to prevent clipping 1 In your Reason Song Session Bypass AutorouJng and Create a Bu re Beat Repeater ReposiJon Bu re so that it sits directly under the Master SecJon Dev...

Page 31: ...u re and on the contextual menu select the item Combine Bu re will now be nested inside a combinator sub rack 6 Inside the Combinator sub rack create a Thor Polysonic Synthesizer Only the step sequenc...

Page 32: ...can modify the combinator to make this adjustable from a combinator Rotary control if you need variable resoluJon The keyboard response of the step sequencer is monophonic and legato performance will...

Page 33: ...tifacts are pure tones or bass heavy material The worst case would be low frequency sine waves If you find a situation where Buffre cannot process the loop without a very hard zero crossing glitch add...

Page 34: ...8 Triplets On 19 Pitch 20 Pitch Steps 21 Pitch Snap 51 Randomize 52 Random Link 23 Release 24 Gate On 25 Gate Start 26 Gate Length 27 Reset Position 28 Position Advance 29 Position Backward 39 FX Send...

Page 35: ...ets Pitch Pitch Pitch Steps PitchSteps Pitch Snap Pitch Snap Randomize Random Random Link Link Random Release Release Gate On Gate Enable Gate Start Gate Start Gate Length Gate Length Reset Position R...

Page 36: ...e maps Koshdukai offers some great advice http koshdukaimusicreason blogspot pt 2012 06 rack extensions remote side of it html Scope Peff com peff Buffre Control Surface Item Key Remotable Item Scale...

Page 37: ...FF All Rights Reserved http peff com TECHNOLOGY Propellerhead REASON and Rack Extensions Propellerhead Software AB Stockholm Sweden PEFF Rack Extension Design and Development Hayden Bursk Kurt Kurasak...

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